2008 CHEVROLET SILVERADO check engine light

When You Are Ready to Leave After
Parking on a Hill
1. Apply your regular brakes and hold the pedal down
while you:
Start your engine
Shift into a gear
Release the parking brake
2. Let up on the brake pedal.
3. Drive slowly until the trailer is clear of the chocks.
4. Stop and have someone pick up and store the
chocks.
Maintenance When Trailer Towing
Your vehicle will need service more often when you’re
pulling a trailer. SeeScheduled Maintenance (Gasoline
Engine) on page 6-4for more information. Things
that are especially important in trailer operation are
automatic transmission uid (don’t overll), engine oil,
axle lubricant, belt, cooling system and brake system.
Each of these is covered in this manual, and the Index
will help you nd them quickly. If you’re trailering, it’s
a good idea to review these sections before you
start your trip.
Check periodically to see that all hitch nuts and bolts
are tight.
Trailer Wiring Harness
Your vehicle is equipped with one of the following wiring
harnesses for towing a trailer or hauling a slide-in
camper.
Basic Trailer Wiring
All regular, extended cab and crew cab pickups have a
seven-wire trailer towing harness.
For vehicles not equipped with heavy duty trailering, the
harness is clipped to the vehicle’s frame behind the
spare tire mount. The harness requires the installation
of a trailer connector, which is available through
your dealer.
If you need to tow a light-duty trailer with a standard
four-way round pin connector, you can also get an
adapter from your dealer.
4-90

(e)Make sure the safety belt reminder light and safety
belt assemblies are working properly. Look for any other
loose or damaged safety belt system parts. If you see
anything that might keep a safety belt system from doing
its job, have it repaired. Have any torn or frayed safety
belts replaced. Also see Checking the Restraint Systems
on page 1-88.
(f)Lubricate all key lock cylinders, body door hinges,
hood latch assembly, secondary latch, pivots, spring
anchor, release pawl, tailgate hinges, tailgate linkage,
tailgate handle pivot points, latch bolt, fuel door
hinge, locks, and folding seat hardware. More frequent
lubrication may be required when exposed to a
corrosive environment. Applying silicone grease on
weatherstrips with a clean cloth will make them
last longer, seal better, and not stick or squeak.
(g)Check vent hose at transfer case for kinks and
proper installation. Check to be sure vent hose
is unobstructed, clear, and free of debris. During any
maintenance, if a power washer is used to clean
mud and dirt from the underbody, care should be taken
to not directly spray the transfer case output seals.
High pressure water can overcome the seals and
contaminate the transfer case fluid. Contaminated fluid
will decrease the life of the transfer case and should
be replaced.(h)Change automatic transmission fluid and filter if the
vehicle Gross Vehicle Weight Rating (GVWR) is
over 8600 lbs or if the vehicle is mainly driven under
one or more of these conditions:
In heavy city traffic where the outside temperature
regularly reaches 90°F (32°C) or higher.
In hilly or mountainous terrain.
When doing frequent trailer towing.
Uses such as found in taxi, police or delivery
service.
(i)Drain, flush, and refill cooling system. This service
can be complex; you should have your dealer/retailer
perform this service. See Engine Coolant on page 5-29
for what to use. Inspect hoses. Clean radiator,
condenser, pressure cap, and filler neck. Pressure test
the cooling system and pressure cap.
(j)A fluid loss in any vehicle system could indicate a
problem. Have the system inspected and repaired and
the fluid level checked. Add fluid if needed.
(k)Inspect system. Check all fuel and vapor lines and
hoses for proper hook-up, routing, and condition. Check
that the purge valve, if the vehicle has one, works
properly. Replace as needed.
6-9

Center High-Mounted Stoplamp (CHMSL) and
Cargo Lamp...............................................5-63
Center Seat...................................................1-12
Chains, Tire...................................................5-92
Charging System Light....................................3-45
Check
Engine Light...............................................3-49
Checking Things Under the Hood......................5-12
Chemical Paint Spotting.................................5-122
Child Restraints
Child Restraint Systems...............................1-42
Infants and Young Children...........................1-39
Lower Anchors and Tethers for Children..........1-45
Older Children.............................................1-35
Securing a Child Restraint in a
Rear Seat Position...................................1-54
Securing a Child Restraint in the
Center Front Seat Position........................1-57
Securing a Child Restraint in the
Right Front Seat Position..........1-57, 1-62, 1-66
Where to Put the Restraint...........................1-44
Cigarette Lighter.............................................3-24
Cleaning
Aluminum or Chrome-Plated Wheels.............5-120
Exterior Lamps/Lenses................................5-118
Fabric/Carpet............................................5-115
Finish Care...............................................5-119Cleaning (cont.)
Instrument Panel, Vinyl, and Other Plastic
Surfaces...............................................5-117
Interior.....................................................5-114
Leather....................................................5-116
Tires........................................................5-121
Underbody Maintenance.............................5-122
Washing Your Vehicle.................................5-118
Weatherstrips............................................5-117
Windshield and Wiper Blades......................5-120
Climate Control System...........................3-25, 3-28
Dual Automatic............................................3-29
Outlet Adjustment........................................3-35
Clock, Setting.................................................3-86
Collision Damage Repair..................................7-11
Compass...............................................2-56, 2-58
Content Theft-Deterrent....................................2-18
Control of a Vehicle.......................................... 4-3
Coolant
Engine.......................................................5-29
Engine Temperature Gage............................3-48
Surge Tank Pressure Cap.............................5-32
Cooling System..............................................5-35
Cruise Control................................................3-13
Cruise Control Light........................................3-54
Cupholders....................................................2-78
3

E
EDR .............................................................7-16
Electrical System
Add-On Equipment.....................................5-125
Center Instrument Panel Fuse Block.............5-128
Fuses and Circuit Breakers.........................5-125
Instrument Panel Fuse Block.......................5-126
Power Windows and Other Power Options....5-125
Underhood Fuse Block...............................5-129
Windshield Wiper Fuses.............................5-125
Electronic Immobilizer
PASS-Key
®III+...........................................2-20
Electronic Immobilizer Operation
PASS-Key
®III+...........................................2-20
Engine
Air Cleaner/Filter.........................................5-20
Check and Service Engine Soon Light............3-49
Coolant......................................................5-29
Coolant Heater............................................2-27
Coolant Temperature Gage...........................3-48
Drive Belt Routing.......................................6-17
Engine Compartment Overview......................5-14
Exhaust.....................................................2-54
Fan Noise..................................................5-40
Fast Idle System.........................................2-25
Oil .............................................................5-15
Oil Life System...........................................5-18
Overheated Protection Operating Mode...........5-34Engine (cont.)
Overheating................................................5-32
Starting......................................................2-24
Entry Lighting.................................................3-21
Event Data Recorders.....................................7-17
Exit Lighting...................................................3-21
Extender, Safety Belt.......................................1-35
Exterior Lamps...............................................3-17
F
Fast Idle System............................................2-25
Filter
Engine Air Cleaner......................................5-20
Finish Damage.............................................5-122
Fixed Mast Antenna.......................................3-134
Flashers, Hazard Warning.................................. 3-8
Flash-to-Pass.................................................3-11
Flat Tire........................................................5-93
Flat Tire, Changing.........................................5-94
Flat Tire, Storing...........................................5-110
Fluid
Automatic Transmission........................5-22, 5-26
Power Steering...........................................5-41
Windshield Washer......................................5-42
Fog Lamp
Fog ...........................................................3-20
Fog Lamp Light..............................................3-53
Four-Wheel Drive....................................2-36, 5-54
5

H
Hazard Warning Flashers................................... 3-8
Head Restraints..............................................1-11
Headlamp
Aiming .......................................................5-58
Headlamps....................................................5-62
Bulb Replacement.......................................5-61
Daytime Running Lamps...............................3-18
Exterior Lamps............................................3-17
Flash-to-Pass..............................................3-11
Halogen Bulbs............................................5-61
High/Low Beam Changer..............................3-10
On Reminder..............................................3-18
Pickup Box Identication and
Fender Marker Lamps...............................5-64
Heated Seats................................................... 1-5
Heater...................................................3-25, 3-28
Engine Coolant...........................................2-27
Heater...........................................................3-29
Highbeam On Light.........................................3-54
Highway Hypnosis...........................................4-29
Hill and Mountain Roads..................................4-30
Hood
Checking Things Under................................5-12
Release.....................................................5-13
Horn ............................................................... 3-8
How to Wear Safety Belts Properly...................1-19
I
Ignition Positions.............................................2-22
Infants and Young Children, Restraints...............1-39
Ination - Tire Pressure...................................5-76
Instrument Panel
Brightness..................................................3-21
Cluster.......................................................3-37
Overview...............................................3-4, 3-6
Storage Area..............................................2-78
J
Jump Starting.................................................5-47
K
Keyless Entry System....................................... 2-4
Keys............................................................... 2-3
7

O
Odometer......................................................3-38
Odometer, Trip...............................................3-38
Off-Road Driving.............................................4-12
Off-Road Recovery..........................................4-10
Oil
Engine.......................................................5-15
Pressure Gage............................................3-52
Pressure Light.............................................3-53
Oil, Engine Oil Life System..............................5-18
Older Children, Restraints................................1-35
Online Owner Center........................................ 7-4
OnStar, Privacy..............................................7-18
OnStar
®System, see OnStar®Manual...............2-67
Operation, Universal Home Remote System........2-71
Other Warning Devices...................................... 3-8
Outlet Adjustment............................................3-35
Outlets
Accessory Power.........................................3-23
Outside
Manual Mirrors............................................2-59
Power Foldaway Mirrors...............................2-62
Power Mirrors.............................................2-61
Towing Mirrors............................................2-60
Overheated Engine Protection Operating Mode....5-34
Owner Checks and Services.............................6-10
Owners, Canadian............................................... ii
P
Paint, Damage..............................................5-122
Park
Shifting Into................................................2-51
Shifting Out of............................................2-53
Park Aid........................................................2-64
Park Brake....................................................2-50
Parking
Assist........................................................2-64
Over Things That Burn.................................2-53
Passenger Airbag Status Indicator.....................3-43
Passenger Sensing System..............................1-81
Passing.........................................................4-11
PASS-KEY
®III+ Electronic Immobilizer...............2-20
PASS-Key®III+ Electronic Immobilizer
Operation...................................................2-20
Perchlorate Materials Requirements, California...... 5-5
Pickup Conversion to Chassis Cab....................4-50
Power
Door Locks.................................................2-10
Electrical System.......................................5-125
Lumbar Controls........................................... 1-4
Retained Accessory (RAP)............................2-24
Seat............................................................ 1-3
Sliding Rear Window....................................2-17
Steering Fluid.............................................5-41
Windows....................................................2-16
10